Approximately how long did it take for the human population to reach 1 billion?
A. more than 100,000 years
B. more than 1 million years
C. more than 2 million years
D. more than 5 million years
E. more than 10 million years
A
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A behavioral physiologist is studying the homeostatic control of blood pH. In a trial, a lizard runs on a treadmill for a set amount of time and the blood pH is measured
The blood pH drops as carbon dioxide is released into the bloodstream. Which component of the homeostatic feedback system is responsible for deciding if the blood pH is far enough from normal that a response is necessary? A) effector B) sensor C) integrator D) assimilator
Genes that are always "turned on" in a cell are referred to as
A) regulated genes. B) mutations. C) inducible. D) constitutive. E) catabolic.
If method A is initiated, what would be the annual growth of kudzu?
a. 15,000 acres b. 30,000 acres c. 120,000 acres d. 240,000 acres
The process by which cells break down complex molecules in the presence of oxygen to release energy is called ____
a. anabolism b. photosynthesis c. metabolism d. translation e. cellular respiration